Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 17-12-2021 and time 04:21:11 (UTC) in region Confine Italia Svizzera (SVIZZERA)

A magnitude ML 0.8 earthquake occured in region: Confine Italia Svizzera (SVIZZERA), on

  • 17-12-2021 04:21:11 (UTC)
  • 17-12-2021 05:21:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.6430, 10.3370 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Tubre BZ 10 977 977
Stelvio BZ 17 1161 2138
Malles Venosta BZ 17 5162 7300
Glorenza BZ 17 896 8196
Valdidentro SO 17 4125 12321
Livigno SO 19 6389 18710
Sluderno BZ 19 1804 20514
Bormio SO 19 4121 24635
Prato allo Stelvio BZ 20 3474 28109

Municipalities with at least 50000 inhabitants

An earthquake occurred to
80 Km W of Bolzano (106441 inhabitants)
88 Km NW of Trento (117317 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 0.8 2021-12-17
04:21:11		 46.6433 10.3372 11 2021-12-17
04:31:28		 Sala Sismica INGV-Roma 98609571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-17 04:21:11 ± 0.08
Latitude 46.6433 ± 0.0054
Longitude 10.3372 ± 0.0052
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98609571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 618
Semi-minor axis of confidence ellipse (meter) 383
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 356
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 148
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.67899
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 98609571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-17 04:31:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
SI.ABSI.HHZ. 2021-12-17T04:21:34.30 0.1 undecidable manual S 82 75.369 50 0.01 88
SI.ABSI.HHZ. 2021-12-17T04:21:25.07 0.1 undecidable manual P 82 75.369 50 0.33 84
CH.DAVOX.HHZ. 2021-12-17T04:21:23.76 0.6 undecidable manual S 294 38.0286 50 -0.54 41
CH.BERNI.HHZ. 2021-12-17T04:21:23.37 0.1 undecidable manual S 223 35.0427 50 -0.13 93
ST.CARE.EHZ. 2021-12-17T04:21:23.73 0.1 undecidable manual S 131 36.4413 50 -0.16 92
SI.ZEN8.EHZ. 2021-12-17T04:21:20.34 3.0 undecidable manual P 0
ST.CARE.EHZ. 2021-12-17T04:21:19.14 1.0 positive manual P 131 36.4413 50 0.4 22
IV.BORM.HNE. 2021-12-17T04:21:19.38 0.3 undecidable manual S 171 19.5693 50 0 74
IV.BRMO.HHZ. 2021-12-17T04:21:19.04 0.1 undecidable manual S 172 18.7701 50 -0.12 96
SI.MOSI.HHZ. 2021-12-17T04:21:18.23 0.1 undecidable manual S 100 16.4724 50 -0.32 92
CH.DAVOX.HHZ. 2021-12-17T04:21:18.86 0.3 negative manual P 294 38.0286 50 -0.12 69
CH.BERNI.HHZ. 2021-12-17T04:21:18.74 0.1 undecidable manual P 223 35.0427 50 0.23 92
CH.FUORN.HHE. 2021-12-17T04:21:16.02 0.1 undecidable manual S 245 6.1938 151 -0.08 100
IV.BORM.HNE. 2021-12-17T04:21:16.40 0.3 undecidable manual P 171 19.5693 50 0.27 70
IV.BRMO.HHZ. 2021-12-17T04:21:16.07 0.3 undecidable manual P 172 18.7701 50 0.06 73
SI.MOSI.HHZ. 2021-12-17T04:21:15.78 0.6 undecidable manual P 100 16.4724 50 0.12 48
CH.FUORN.HHE. 2021-12-17T04:21:14.48 0.1 undecidable manual P 245 6.1938 151 0.24 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
SI.MOSI.HHE. ML:0.7 0.00003925933 0.2624 AML other m 2021-12-17T04:21:18.70
IV.BRMO.HHE. ML:0.9 0.00005895 0.16 AML other m 2021-12-17T04:21:19.13
SI.MOSI.HHN. ML:0.9 0.00006495397 0.5376 AML other m 2021-12-17T04:21:19.98
IV.BRMO.HHN. ML:0.5 0.000022504227500000002 0.1024 AML other m 2021-12-17T04:21:19.35
CH.BERNI.HHE. ML:0.7 0.0000204856065 0.08 AML other m 2021-12-17T04:21:23.83
CH.BERNI.HHN. ML:0.8 0.00002433951 0.1504 AML other m 2021-12-17T04:21:23.76
CH.DAVOX.HHE. ML:1.2 0.000060488779499999996 0.1472 AML other m 2021-12-17T04:21:23.91
ST.CARE.EHE. ML:0.6 0.0000148919065 0.1408 AML other m 2021-12-17T04:21:24.83
ST.CARE.EHN. ML:0.6 0.000013890485000000001 0.0608 AML other m 2021-12-17T04:21:24.35
IV.ZEN8.EHE. ML:1.4 0.000022092315 0.0608 AML other m 2021-12-17T04:21:21.15
IV.ZEN8.EHN. ML:1.6 0.000028931465 0.0576 AML other m 2021-12-17T04:21:21.19
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download